add centos stream support

Summary:
Distro name wasn't matching and thus no rpms being installed or used

Also improved the error message for unknown systems

Reviewed By: farnz

Differential Revision: D32139850

fbshipit-source-id: 438278094159f732f6b1de506490b89d2c9cd3f7

build/fbcode_builder/getdeps.py

@@ -366,7 +366,10 @@ class InstallSysDepsCmd(ProjectCmdBase):
             if packages:
                 run_cmd(["apt", "install", "-y"] + packages)
         else:
-            print("I don't know how to install any packages on this system")
+            host_tuple = loader.build_opts.host_type.as_tuple_string()
+            print(
+                f"I don't know how to install any packages on this system {host_tuple}"
+            )
 
 
 @cmd("list-deps", "lists the transitive deps for a given project")

build/fbcode_builder/getdeps/platform.py

@@ -99,7 +99,7 @@ class HostType(object):
     def get_package_manager(self):
         if not self.is_linux():
             return None
-        if self.distro in ("fedora", "centos"):
+        if self.distro in ("fedora", "centos", "centos stream"):
             return "rpm"
         if self.distro.startswith(("debian", "ubuntu")):
             return "deb"